VEHICLE STABILITY CONTROL SYSTEM TEST MODE PROCEDURE


  1. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK


    1. Release the parking brake.

      Note

      Before releasing the parking brake, move the shift lever to P (for automatic transmission) or set chocks to prevent the vehicle from rolling.

      Tech Tips

      When the parking brake is applied or the brake fluid level is low, the brake warning light comes on.

    2. When the ignition switch is turned to ON, check that the ABS warning, brake warning, TRC OFF indicator, VSC OFF indicator, VSC SPORT indicator and slip indicator lights all come on.

      Tech Tips


      • If the skid control ECU stores a DTC, the ABS warning and slip indicator lights will come on.

      • If any of the indicators remains on or does not come on, proceed to troubleshooting for the light circuits listed below.

      Trouble Area See Procedure
      ABS warning light circuit (Remains on)

      Click here

      ABS warning light circuit (Does not come on)

      Click here

      Brake warning light circuit (Remains on)

      Click here

      Brake warning light circuit (Does not come on)

      Click here

      TRC OFF indicator light circuit (Remains on)

      Click here

      TRC OFF indicator light circuit (Does not come on)

      Click here

      VSC OFF indicator light circuit (Remains on)

      Click here

      VSC OFF indicator light circuit (Does not come on)

      Click here

      VSC SPORT indicator light circuit (Remains on)

      Click here

      VSC SPORT indicator light circuit (Does not come on)

      Click here

      Slip indicator light circuit (Remains on)

      Click here

      Slip indicator light circuit (Does not come on)

      Click here


      1. When the ignition switch is turned to ON, check that the brake warning, TRC OFF indicator, VSC OFF indicator and VSC SPORT indicator lights turn off after 3 seconds.

      2. When the engine is started, check that the ABS warning and slip indicator lights turn off after 3 seconds.

  2. SENSOR CHECK USING TEST MODE (SIGNAL CHECK)

    Tech Tips

    DTCs are stored if any malfunctions are detected during the check of each sensor.


    1. Procedure to enter Test Mode


      1. Turn the ignition switch off.

      2. Check that the steering wheel is centered.

      3. Check that the shift lever is in neutral.

      4. Connect the GTS to the DLC3.

      5. Turn the ignition switch to ON.

      6. Turn the GTS on.

      7. Switch the skid control ECU to Test Mode using the GTS. Enter the following menus: Chassis / ABS/VSC/TRC / Utility / Signal Check.

      8. Check that the ABS warning and slip indicator lights come on.

    2. Speed Sensor Check


      1. Drive the vehicle straight-ahead.

        Accelerate the vehicle to a speed of 45 km/h (28 mph) or more for several seconds.

        Tech Tips


        • The sensor check may not complete if wheelspin occurs.

        • The speed sensor check may not complete if the speed sensor check is started while turning the steering wheel or spinning the wheels.

        Note

        After the ABS warning light goes off, if the vehicle speed exceeds 80 km/h (50 mph), a sensor check code will be stored again.

        Decelerate or stop the vehicle before the speed reaches 80 km/h (50 mph).

      2. Check that the ABS warning light goes off.

        Tech Tips


        • The ABS warning light goes off when the sensor check has completed.

        • The ABS warning light comes on immediately after a malfunction has been detected during the speed sensor check.

      3. Stop the vehicle.

        Tech Tips

        When the sensor check has completed, the ABS warning light goes off.

        Note

        If the sensor check has not completed, the ABS warning light will come on and the ABS system will not operate.

    3. End of Sensor Check


      1. If the sensor checks have completed, the ABS warning light goes off.

        Note

        If the sensor checks have not completed, the ABS warning light come on and the ABS system will not operate.

    4. Reading Sensor Check DTCs


      1. Read the DTC(s) by following the GTS screen.

        Note


        • If only DTCs other than Test Mode sensor check DTCs are displayed, repair the malfunctions and clear the DTCs.

        • If Test Mode sensor check DTCs and other DTCs are displayed or if only Test Mode sensor check DTCs are displayed, repair the malfunctions, clear the DTCs, and perform Test Mode inspection again.

        Tech Tips

        See "Sensor Check DTCs".

      2. Turn the ignition switch off and disconnect the GTS.

    5. Sensor Check DTCs

      ABS Sensor
      DTC No. Detection Item Trouble Area
      C1271 Low Output Signal of Front Speed Sensor RH

      • Front speed sensor RH

      • Sensor installation

      • Front speed sensor rotor RH (Front axle hub sub-assembly RH)
      C1272 Low Output Signal of Front Speed Sensor LH

      • Front speed sensor LH

      • Sensor installation

      • Front speed sensor rotor LH (Front axle hub sub-assembly LH)
      C1273 Low Output Signal of Rear Speed Sensor RH

      • Rear speed sensor RH

      • Sensor installation

      • Rear speed sensor rotor RH (Rear axle hub and bearing assembly RH)
      C1274 Low Output Signal of Rear Speed Sensor LH

      • Rear speed sensor LH

      • Sensor installation

      • Rear speed sensor rotor LH (Rear axle hub and bearing assembly LH)
      C1275 Abnormal Change in Output Signal of Front Speed Sensor RH Front speed sensor rotor RH (Front axle hub sub-assembly RH)
      C1276 Abnormal Change in Output Signal of Front Speed Sensor LH Front speed sensor rotor LH (Front axle hub sub-assembly LH)
      C1277 Abnormal Change in Output Signal of Rear Speed Sensor RH Rear speed sensor rotor RH (Rear axle hub and bearing assembly RH)
      C1278 Abnormal Change in Output Signal of Rear Speed Sensor LH Rear speed sensor rotor LH (Rear axle hub and bearing assembly LH)

      Tech Tips

      The codes in this table are output only in Test Mode (signal check).